6.2 gets a bad rap. It was never meant for power, it was meant for fuel savings and if not over revved would last a long time.
It was much more manageable with the sm465 than with the array of autos that could be had with it though.
The 6.2L paid the price because of the bad rep of the converted 350 in the cars, a friend had an Olds or Buick with the converted 350 and had continuous problems.